Micronas Hall-Effect Sensors for Industrial Applications (Part 4)

Symmetry Electronics Team in Blogs on August 31, 2016

About Symmetry Electronics Team

Established in 1998, Symmetry Electronics is a focused global distributor of wireless connectivity solutions, sensors, and audio-video technologies. Offering comprehensive design support and available-to-ship inventory, Symmetry is committed to helping engineers accelerate time to market, reduce costs, and offer modern solutions for their IoT designs. Acquired by the Berkshire Hathaway company TTI, Inc. in 2017, Symmetry Electronics is headquartered in Los Angeles with international offices in Mexico, Canada, and China.

Micronas HAL206TQ-K

Value-Optimized Hall-Effect Sensor Family

Package: SOT89 SMD

Ordering Code: HAL 206TQ-K

Interface: 3-WireSwitching Behavior: Unipolar, High Sensitivity

Temp. Range: -40°C to +140°C

Switching Points [mT] at 25°C: BON 12.0 - BOFF 6.5

Micronas offers the world’s broadest range of Hall-effect sensors, which are increasingly being utilized in a variety of industrial applications, including factory and process automation; building, home, and office automation; medical applications; mobility and robotics controllers; agriculture and heavy machinery; garden and power tools; and household items such as washing machines, tumble dryers, induction cookers, and heating and cooling (HVAC) systems.

The HAL 206 Hall switch is produced in CMOS technology. The sensors include a temperature-compensated Hall plate with active offset compensation, a comparator, and an open-drain output transistor. The active offset compensation leads to magnetic characteristics which are robust against mechanical stress effects. In addition, the magnetic characteristics are constant in the full supply voltage and temperature range. The comparator compares the actual magnetic flux through the Hall plate (Hall voltage) with the fixed reference values (switching points). Based on the reading, the output transistor is switched on or off.

The sensors are designed for industrial applications and operate with supply voltages from 3.8 V to 24 V in the ambient temperature range from −40 °C up to 125 °C.

Major Applications

Endposition detection
RPM measurement of motors in various applications, such as power window
Brushless DC motors
RPM measurements in flow meters
Replacement of micro switches

Block Diagram – System Architecture

Features

Operates from 3.8 V to 24 V supply voltage
Operates with static magnetic fields and dynamic magnetic fields up to 10 kHz
Overvoltage protection at all pins
Reverse voltage protection at VDD pin
Magnetic characteristics are robust against mechanical stress effects
Short-circuit protected open-drain output by thermal shut down
Constant switching points over a wide supply voltage and temperature range
The decrease of magnetic flux density caused by rising temperature in the sensor system is compensated by a built-in negative temperature coefficient of the magnetic characteristics
High temperature stability for automotive or industrial applications
High ESD rating